Implementing the State’s New Green Building Code for Residential Construction
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Transcript of Implementing the State’s New Green Building Code for Residential Construction
Implementing the State’s New Green Building Code for
Residential Construction
California Department of Housing and Community Development
HCD AuthorityHotels, Motels
Lodging HousesApartment Houses
DwellingsHomeless Shelters
Monasteries, ConventsEmployee Housing
Factory-Built Housing
California Department of Housing and Community Development
HCD Amends and Proposes the Following Codes for Adoption into Title 24:
Part 2 - California Building Code
Part 2.5 - California Residential Code
Part 3 - California Electrical Code
Part 4 - California Mechanical Code
Part 5 - California Plumbing Code
Part 10 - California Existing Building Code
Part 11 - California Green Building Standards Code
California Department of Housing and Community Development
2010 CALGreen Code
Mandatory effective date for most measures concurrent with 2010 California Codes
Effective date is January 1, 2011
Mandatory effective date for Water Conservation measures
Effective July 1, 2011 Concerns over availability of fixtures and performance
California Department of Housing and Community Development
Published Resources Reviewed During Development
National Association of Home Builders Guidelines
Leadership in Energy and Environmental Design
Build It Green
California Green Builder Program
Draft ASHRAE Standard 189P
California Department of Housing and Community Development
State Agencies and Stakeholders Air Resources Board California Energy Commission California Integrated Waste Management Board Department of General Services Department of Public Health Department of Water Resources Building Officials Representatives from the Construction Industry Representatives from International Building Code Writing Bodies Representatives from the Environmental Community
California Department of Housing and Community Development
Chapter 1 - Administration
California Department of Housing and Community Development
Scope
Newly constructed residential buildings.
Three stories or less in height.
Does not currently apply to renovation or additions.
California Department of Housing and Community Development
Appendices
Are not mandatory unless adopted by state agency.
Are not mandatory unless adopted by local government.
California Department of Housing and Community Development
Local Modification
Local government may make modifications.
Justification for making local modifications. Climate Topography Geology
Local environmental conditions established by the city,
county or city and county are included in this criteria.
California Department of Housing and Community Development
Chapter 3 – Green Building
California Department of Housing and Community Development
Mixed Occupancies and Phased Projects
Shall comply with appropriate requirements for each separate occupancy type.
Only work being performed must comply.
California Department of Housing and Community Development
Tiers
Voluntary unless adopted by local government.
Intended to provide a consistent statewide method to further enhanced building practices.
Appendices align with mandatory chapters. Chapter 4 and 4A for residential, Chapters 5 and 5A for non- residential.
Tiers have prerequisite and elective measures.
California Department of Housing and Community Development
Chapter 4 – Residential Mandatory Measures
California Department of Housing and Community Development
Five Divisions
Division 4.1 - Planning and Design
Division 4.2 - Energy Efficiency
Division 4.3 - Water Efficiency and Conservation
Division 4.4 - Material Conservation and Resource Efficiency
Division 4.5 - Environmental Quality
California Department of Housing and Community Development
Division 4.1 - Planning and Design
California Department of Housing and Community Development
§ 4.106.2 Storm water drainage and retention. Construction projects less than one acre are outside the
scope of the California State Water Resources Control Board (SWRCB).
Will help prevent flooding of adjacent property and prevent pollution from storm water runoff by retaining soil on-site or by providing filtering to restrict sedimentation from reaching storm water drainage systems and receiving streams or rivers.
Establishes criteria for a plan to manage storm water drainage
during construction.
California Department of Housing and Community Development
How to comply
§ 4.106.2 Storm water drainage and retention. Retention basin sized and shown on the site plan. Filtering storm water and routing to a public drainage system. Compliance with local storm water ordinance.
California Department of Housing and Community Development
§ 4.106.3 Surface Drainage. Requires planning of the surface drainage system that will
serve the site. Requires the construction plans to indicate how surface
drainage will be managed.
California Department of Housing and Community Development
How to comply
§ 4.106.3 Storm water drainage and retention. Drainage system is shown on site plan.
Swales Drain piping Retention areas Ground water recharge
California Department of Housing and Community Development
Division 4.2 – Energy Efficiency
California Department of Housing and Community Development
Energy Efficiency
§ 4.201.1 Minimum Energy Performance for Low-Rise Residential Buildings.
The California Energy Commission (CEC) adopts regulations to establish the minimum level of energy efficiency a heated or cooled structure must meet or exceed.
California Department of Housing and Community Development
How to comply
§ 4.201.1 Energy Efficiency. Prescriptive Method Performance Method Tiers
Performance calculation can show percentages above minimum
California Department of Housing and Community Development
Division 4.3 – Water Efficiency and Conservation
California Department of Housing and Community Development
§ 4.303.1 20% Water savings. Requires a 20% reduction of indoor water use. Provides a prescriptive and performance method.
Mandatory effective date for 20% reduction is July 1, 2011
Concerns over availability of fixtures and performance
California Department of Housing and Community Development
How to comply Method #1
§ 4.303.1 20% Indoor Water savings. Prescriptive Method
Table 4.303.2 Showerheads ≤ 2.0 gpm @ 80 psi Lavatory Faucets ≤ 1.5 gpm @ 60 psi Kitchen Faucets ≤ 1.8 gpm @ 60 psi Urinals ≤ .5 gal/flush
California Department of Housing and Community Development
How to comply method #2
§ 4.303.1 20% Indoor Water savings. Performance Method
Use the performance calculation worksheets in Chapter 8 or other calculation acceptable to the enforcing agency
Fixtures used in performance calculation are limited Water closets Urinals Lavatory Faucets Showerheads
California Department of Housing and Community Development
§ 4.303.2 Multiple Showerheads Serving One Shower. When using the prescriptive method, the sum of multiple
showerheads shall not exceed the flow rate specified in Table 4.303.2.
When using the prescriptive method, the maximum flow rate for each shower head shall not exceed 2.5 gpm @ 80 psi.
California Department of Housing and Community Development
§ 4.303.3 Plumbing Fixtures and Fittings. Specifies acceptable performance standards for plumbing
fixtures with reduced water usage.
California Department of Housing and Community Development
How to comply§ 4.303.3 Plumbing Fixtures and Fittings.
Install a fixture which meets the standards listed in Table 4.303.3.
Obtain alternate approval from the enforcing agency for use of fixtures not listed.
California Department of Housing and Community Development
§ 4.304.1 Irrigation Controllers. Requires irrigation controls to be weather- or soil moisture-
based and automatically adjust irrigation in response to changes in plants' needs as weather conditions change, or have rain sensors or communication systems that account for local rainfall.
California Department of Housing and Community Development
How to comply
§ 4.304.1 Irrigation Controllers. Applies to controllers installed at time of final inspection Automatically delay watering cycle due to rain Can be communication based Can be based on plant watering needs Can be based on soil moisture
California Department of Housing and Community Development
Division 4.4 – Material Conservation and Resource Efficiency
California Department of Housing and Community Development
§ 4.406.1 Joints and Openings. Establishes a requirement to fill spaces around pipes and
other penetration in the building with materials that will prevent the passage of rodents.
California Department of Housing and Community Development
How to comply§ 4.406.1 Joints and Openings.
Use metal plates or covers Use cementitious material to seal opening Other methods approved by the enforcing agency
California Department of Housing and Community Development
§ 4.408.1 through 4.408.2.2 Construction Waste Reduction, Disposal and Recycling.
Requires at least of 50% of nonhazardous construction and demolition debris to be recycled and/or salvaged, or;
Compliance with a local waste ordinance which is
more stringent. Exceptions:
Soil and land clearing debris are exempt Alternate methods or exceptions may be approved
due to local constraints
California Department of Housing and Community Development
How to comply§ 4.408.1 through 4.408.2.2 Construction Waste Reduction, Disposal and Recycling.
Comply with local waste management ordinance. Develop a waste management plan and submit for approval
to the enforcing agency. Provide documentation of compliance.
Sample forms are provided in Chapter 8. HCD is developing additional forms.
California Department of Housing and Community Development
§ 4.410.1 Building Maintenance and Operation. Requires educational materials, operation and maintenance
manuals are provided to ensure buildings and equipment are properly maintained.
As construction practices become more sophisticated, a certain level of knowledge is required to maintain building systems and equipment.
Requires additional information be provided regarding other topics such as landscape design and maintenance, public transportation options, recycle opportunities, special inspection reports, and energy incentive programs.
California Department of Housing and Community Development
How to comply§ 4.410.1 Building Maintenance and Operation.
Develop a manual and place it in the home at the time of final inspection.
Media shall be approved by the enforcing agency. Utilize a web-based program to make the manual accessible. HCD is developing a sample standard format for the manual.
California Department of Housing and Community Development
Division 4.5 – Environmental Quality
California Department of Housing and Community Development
§ 4.503.1 Fireplaces. Requires gas fireplaces to be direct-vent, wood and pellet
stoves to comply with EPA limits or comply with a local ordinance which is more or prohibitive.
California Department of Housing and Community Development
How to comply§ 4.503.1 Fireplaces.
Install direct vent gas fireplaces. Install a pellet or wood stove which meets US EPA Phase II
emission standards. Comply with local ordinance.
California Department of Housing and Community Development
§ 4.504.1 Covering of Duct Openings and Protection of Mechanical Equipment During Construction.
Requires duct openings, permanent mechanical equipment and other components that will be used to move air in the building after occupancy be protected from contamination during construction.
These systems are commonly used to condition the building during construction. Typically, they are not protected leading to a collection of dust and debris
exposed to the circulated air within the
structure.
California Department of Housing and Community Development
How to comply§ 4.504.1 Covering of Duct Openings and Protection of Mechanical Equipment During Construction.
Cover return and supply openings with plastic or sheetmetal. Wrap or protect equipment stored on the jobsite for future
installation. If necessary plan for alternate space conditioning systems
during constuction.
California Department of Housing and Community Development
§ 4.504.2 Finish Material Pollutant Control. Limits pollutants from the off-gassing of finish materials inside
a residence. Tables are provided that establish limits on the emissions of
VOCs in adhesives, paints, and other coatings. VOC limitations are also included for carpet, carpet cushions
and carpet pad adhesives. A table addressing the formaldehyde limits was developed
based on maximum allowable limits recently established by the California Air Resources Board (ARB).
Ensures these levels are met by including a mandatory verification component which requires certification or documentation.
California Department of Housing and Community Development
How to comply§ 4.504.2 Finish Material Pollutant Control.
Collect material specification sheets and make them available at time of inspection.
Product labels. Use the specification sheet HCD is developing as a
compliance aid for this section.
California Department of Housing and Community Development
§ 4.505.2 Concrete Slab Foundations. Provides explicit requirements for the installation of vapor
barriers in slab on grade foundations to address moisture and mold issues that can negatively affect indoor air quality as well as damage floor coverings.
Specifies an aggregate base of ½” or larger material must be used as a capillary break and clarifies that the vapor retarder must be placed above the aggregate and in direct contact with the concrete slab.
Allows equivalent methods to be used provided the same protections will be maintained.
California Department of Housing and Community Development
How to comply§ 4.505.2 Finish Material Pollutant Control.
Follow the prescriptive requirements in this section. Obtain approval from the enforcing agency for an alternate
design. Use the design specified by a licensed California architect or
engineer.
California Department of Housing and Community Development
§ 4.505.3 Moisture Content of Building Materials. Requires the moisture content of construction materials and
insulation to be verified prior to approval to enclose wall and floor cavities with drywall or other finish surfaces.
HCD currently adopts sections of the CBC which specify maximum grading and mill certification levels of moisture in framing materials. This section requires field verification and protection during wet weather.
California Department of Housing and Community Development
How to comply§ 4.505.3 Finish Material Pollutant Control.
Cover building materials to protect them from rain. Ensure the building is weather tight before insulating. Use other precautions necessary to ensure the building
materials are kept dry. Test for moisture levels.
California Department of Housing and Community Development
§ 4.506.1 Bathroom Exhaust Fans. Requires exhaust fans in any room which contains a bathtub
or shower. Allows a whole house ventilation system designed to provide
outside air to be used to comply with this section. Intended to reduce moisture inside the residence. Fans must be ENERGY STAR compliant. Humidistat contols.
California Department of Housing and Community Development
How to comply§ 4.506.1 Bathroom Exhaust Fans.
Install an whole house ventilation system. Install ENERGY STAR fans with humidistat controls in each
bathroom. A bathroom is a room that contains a bathtub or a shower or a
combination of the two.
California Department of Housing and Community Development
§ 4.507.1 Openings. Requires the openings for whole house exhaust fans to be
insulated.
California Department of Housing and Community Development
How to comply§ 4.507.1 Openings.
Install a whole house fan with insulated louvers. Install a fan with an insulated cover. Use a fan with insulated duct connected to penetrations in the
conditioned envelope .
California Department of Housing and Community Development
§ 4.507.2 Heating and Air-conditioning System. Establishes minimum requirements for heating and air
conditioning design. Heat loss and heat gain. Duct system sizing. Equipment selection.
Allows designers flexibility to design based on local conditions.
California Department of Housing and Community Development
How to comply§ 4.507.2 Heating and Air-conditioning System.
Heat loss and heat gain calculation using software or hand calculations or an equivalent.
Duct system design to ensure adequate air flow is provided to address the heat loss and gain in each area of the home.
Select equipment which will provide the necessary air flow and level of conditioning to satisfy the loads, function within the duct design criteria and within the equipment limitations.
California Department of Housing and Community Development
Future Developments
Training and education.
Implementation and compliance aids.
Outreach.
Web based training.
California Department of Housing and Community Development
Department’s Websitewww.hcd.ca.gov